Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Timing Sprocket and Chain

Wrap the chain around the timing sprocket.
Using a vernier calipers, measure the timing sprocket diameter with the chain.
Standard sprocket diameter (w/ chain): 51.72 mm (2.0362 inch)
Minimum sprocket diameter (w/ chain): 50.5 mm (1.988 inch)

NOTICE: When measuring the diameter, vernier calipers must be in contact with the chain roller.

If the diameter is less than minimum, replace the chain and crankshaft.